US4574794A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Orthopaedic bone cutting jig and alignment device
Assignee: Queen's University
•
Filing: 1984-06-01
•
Granted: 1986-03-11
•
Expires: 2004-06-01
Abstract
Abstract An orthopaedic bone cutting jig and alignment frame for facilitating a series of controlled, precise bone cuts to fit selected prosthetic knees which promote bone imgrowth and do not rely upon cement for fixation.
Inventors
- 👤 Theodore D. Cooke
- 👤 Gerald A. B. Saunders
- 👤 David Siu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:13
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/14; A61B17/15; A61B17/154; A61B17/16; A61B17/17; A61B17/1739; A61B17/1764; A61B17/155; A61B17/157
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
144 words
A jig for mounting an orthopaedic bone cutting device comprising: a base; a frame adjustably mounted on said base and comprising first and second pairs of spaced parallel bars mounted perpendicular to each other at adjacent ends of the respective bars; means to adjustably and releasably secure each of a patient's tibia and femur to said frame in anatomical and planar parallel alignment with a respective one of said first and second pairs of parallel bars; planar bed means releasably mounted on either pair of said parallel bars for sliding movement therealong and extending perpendicularly thereto; means to releasably lock said bed means to the selected said parallel bars at any selected position thereon; and means slidably mounted on said bed means for movement perpendicular to said selected pair of parallel bars, adapted to receive and releasably secure thereto said orthopaedic bone cutting device.
Claim 2
Dependent Claim
144 words
A jig for mounting an orthopaedic bone cutting device comprising: a base; a frame adjustably mounted on said base and comprising first and second pairs of spaced parallel bars mounted perpendicular to each other at adjacent ends of the respective bars; means to adjustably and releasably secure each of a patient's tibia and femur to said frame in anatomical and planar parallel alignment with a respective one of said first and second pairs of parallel bars; planar bed means releasably mounted on either pair of said parallel bars for sliding movement therealong and extending perpendicularly thereto; means to releasably lock said bed means to the selected said parallel bars at any selected position thereon; and means slidably mounted on said bed means for movement perpendicular to said selected pair of parallel bars, adapted to receive and releasably secure thereto said orthopaedic bone cutting device.
Claim 3
Dependent Claim
45 words
A jig as claimed in claim 1 including gauge means mounted on said frame to position said bed means at a preselected position on said parallel bars thereby positioning said cutting device to accurately cut one of said tibia and femur at a preselected position.
Claim 4
Dependent Claim
33 words
A jig as claimed in claim 1 or 2 including means adjustably mounted on said frame to selectively and controllably distract said tibia and femur, on line, and retain a perpendicular orientation therebetween.
Claim 5
Dependent Claim
34 words
A jig as claimed in claim 1 wherein said bone cutting device is selected from the group consisting of an oscillating saw, radially oscillating saw, a burr, a drill, a miller and a borer.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-03-10 | 1989-09-09 | 1990-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-03-10 | 1993-09-09 | 1994-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-03-10 | 1997-09-09 | 1998-03-11 | $7700.00 | Window Closed / Lapsed |